Damper for furnace and other regulators



(-No Model.)

G. L. RIDGWAY.

DAMPER FOR FURNACE AND OTHER REGULATORS, No. 367,847. Patented Aug. 9,1881.

WITIJEEJEIEEL IN \/Er\l T 1:1

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' UNITE STATES PATENT QFEICE.

CnAEnEs L. RIDGWAY, OF EVERETT, MASSACHUSETTS, AssIe oE TO THEYRIDGXVAY EUENACE AND STOVE COMPANY, on NASHUA, NEw.

HAMPSHIRE.

DAMPER F-OR FURNACE AND OTHER REGULATORS;

SPECIFICATION forming part of Letters Patent No. 367,847, dated August 9, 1887.

i Application filed September 13, 1886. Serial No.213,37 l. (No model.)

States, have invented a new and useful 'Im provementin Dampers for Furnace and other Regulators, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its nature.

V The object of the invention is to provide a damper for a furnace and other regulator,

which is hung or supported at or above'its upper edge to an exterior support and which closes against a flat surface, and is otherwise so arranged that its operation cannot be affected by rust, soot, dust, and other things which commonly act against the e'fficient working of the ordinary regulator-damper.

- It is essential in regulators 'for furnaces adapted to be operated by expansion and, contraction of a metal pipe ortube extending through the furnace or heating-chamber thereof that the damper which it is designed toopcrate should be hung or supported so as to be moved with as little effort as possible, and as furnaces are often in damp and dusty places,

it is essential that the construction of'the damper should be such that mold, rust, and dust shall not interfere with its quick, easy, and uniform operation. To accomplish this, I have devised a damper the essential elements of which are, first, a'flanged ring adapted to fit the opening of the pipe or box of the regu lator, or an opening in the smoke or other escape pipe of the furnace, and which has a flat surface which acts as a damper or valveseat, and two projections or brackets extending upward, which furnish supports or bearings for the pivots by which the damper or valve is hung, and, second, a damper or valve comof the flanged ring above specified. This con struction of damper brings the pivots and, in fact, all parts of the damper,outside the cold air passage or box of the stove, and suspends the'damper in a manner to permit it to be easily and readily moved.

Referring to the drawings, Figure 1 is a view in perspective illustrating a portion of a furnace-casing with my improvement attached. Fig. 2 is a vertical section of the parts shown in Fig. 1,to further illustrate the construction and operation of my improvement. Fig. 3 is a horizontal section, enlarged, upon the line :0 0c of Fig. 1,to still further show the construction.

A represents thedirect escape-port of a fu rnace. a is a short box extending laterally therefrom and having an opening, a, to the escape'port. A is a collar for receiving the end of the stove pipe or funnel. Upon the end of this box is fitted the flanged ring 13. The ring has the section or partl extcnding into the box and lapping upon its inner surface, and the flange b resting against its endand extending laterally from the ring I). This flange forms or provides the flat or smooth valve seat b", against which the damper or valve is shut. The-flanged ring also has the upwardextending section If, which carries at each end a pivot-support, b1, which has a hole, b extending from the outer surface thereof inward for the support of the pivots. These pivot-supports extend outward from the face of the flanged ring sufficiently to bring the pivot supports or holes outside the said surface in order that the damper hung therefrom may close against the surface b of the flange.

O is the damper. It preferably is formed by a casting, 0, having the annular section or ring 0, which receives a sheet-metal disk, 0', fastened thereto by rivets or in any other desired way, and which has a flat surface, 0, upon its inner side, which comes iii-contact with the surface b of the flanged ring when the valve is closed. The damper also has the upwardlyextending arms a, which are formed to extend inward to a limited extent near their lower ends, or where they support the pivots D.

the arms are also formed to extend outwardly to separate the weights sufficiently to permit them to be moved past the smoke-escape pipe upon the outward movement of the damper.

Each arm 0 has a hole for the reception of a pivot, which preferably is made of brass or other composition, and is fastened thereto by a set-screw, c. This construction enables me to so place the pivots that their ends shall not extend sufficiently into the pivot-holes b as to eomein contact with the ends thereof and cause a binding or clamping action. One of the pivots or pivotrods extends outwardly and forms a support for the weighted lever I l, which is connected with the operating mechanism referred to.

Of course the damper may have a solid section east with the flange,inlieu of the separate plate, and where a separate plate is used it maybe fastened to the ring by rivets, as above described. A damper of this construction cannot be readily affected in its operation by any dust or soot from the furnace or by dust, mold, or rust. It ishung so that when closed the damper-ring shuts upon the flanged ring and remains there, and in opening it is so counterbalanced that it can be moved in any position with substantially the same amount of force.

By making theseetion of the damper of sheet metal lam ofcourse enabled to provide alighter damper, and consequently lighter counter-bat ancing-weights. The damper ofcourse is not only useful in connection with the automatic regulating devices above specified, but it may be used with ahandle, as in an ordinary damper or valve, and without the automatic operating devices.

Of course it is unnecessary that the supports 1)" and the arms 0 both be bent to bring the pivots of the damper-plate to a position to permit the plate to close tightly against the surface 0", as the arms may be curved to a greater extent and the supports be straight, or the supports may be curved to a greater extent and the arms be straight.

Ofcoursethc coldairinletmayhaveasquare or a circular opening, and the other parts be made to conform, and this opening maybe arranged in any part of the direct-escape pipe.

Having thus fully described my invention, 1 claim and desire to secure by Letters Patent of the United States- In adamper, the combination of the pipe or box (I, having an opening, a, the flanged ring or frame B, secured to the said pipe or box, having the valveseat c, the pivot-supports b", extending from said frame,with the flat damper 0, its arm a", pivoted to the side supports, Z)", the eounterbalancing-weights a", and the pivots D, substantially as described.

CHARLES L. THDFHVAY.

In presence of F. F. tAYMONl), 2d, Finn). B. DOLAN. 

